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Order consolidation for smarter shipping and happier customers
Merge multiple orders into one shipment to cut shipping costs, reduce packaging waste, and deliver a seamless experience—without changing your workflows.
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Fewer boxes. Better customer experience.
Customers don’t want multiple boxes—and you shouldn’t pay for them. Send orders going to the same place into one shipment to improve margins and simplify fulfilment from checkout to doorstep.
Cut shipping costs without cutting service
Every extra label, carton, and pickup adds cost. Combine orders by customer or address so you ship fewer packages and avoid unnecessary surcharges. Reduce dimensional weight exposure, lower carrier fees, and protect costs.
Deliver a better customer experience
Deliver multiple orders from the same customer— together. Ship compatible items in one box with one tracking experience—reducing confusion and minimising “Where is the rest of my order?” contacts.
Simplify fulfilment operations
Avoid risking errors and lagging with manual order consolidation. ShipStation API automates the logic within your existing OMS, creating a consistent, repeatable workflow across teams and fulfilment locations.
Order consolidation features built for real-world fulfilment
Combine multiple orders into one shipment
Programmatically group eligible sales orders that share a customer or destination. Your system evaluates address, timing, inventory availability, fulfilment location, and service levels—then creates consolidated shipments via the ShipStation API when it improves efficiency, or keeps orders separate when speed or inventory requires it.
Define flexible consolidation rules
Configure consolidation logic within your existing systems—such as time windows, order value thresholds, product exclusions, service levels, and warehouse eligibility. Once your business rules are set in your OMS, ShipStation APIs execute those decisions in real time as shipments are created.
Reduce packaging waste and carrier fees
Fewer boxes mean fewer labels, cartons, pickups, and surcharges. Order consolidation can lower dimensional weight exposure, reduce carrier spend, and support sustainability goals—improving cost control while minimising packaging waste across your fulfilment network.
Keep orders moving together across locations
Operating multiple warehouses or 3PLs? ShipStation evaluates inventory location, cutoff times, routing logic, and SLA requirements before consolidating—helping you avoid unnecessary split shipments while maintaining inventory accuracy and protecting delivery promises.
Centralise orders before consolidation begins
Unify order data from multiple carts, marketplaces, and systems into a single stream before items are grouped together—so every shipment is evaluated consistently across channels, inventory locations, and service levels. One source of truth. Smarter grouping decisions.
Related Content
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Solved: The 5 Biggest Shipping Challenges Facing British Ecommerce Businesses Today
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Order Consolidation FAQs
What is an order consolidation API?
An order consolidation API identifies multiple orders going to the same customer or address and combines them into a single shipment. Instead of processing each order separately, your system creates one bundled delivery—reducing cost and simplifying fulfillment.
How does consolidation reduce shipping costs?
By reducing the number of labels, cartons, and pickups per customer. Fewer packages typically mean fewer surcharges, lower dimensional weight exposure, and reduced overall carrier spend.
Does order consolidation impact delivery speed?
Not when configured correctly. ShipStation applies your timing and service rules before consolidating. Orders are only grouped when they can ship together without missing delivery commitments or cutoff times.
How does consolidation affect inventory accuracy?
The API evaluates inventory availability before merging orders. If items are split across locations or unavailable within your defined window, consolidation will not occur. This protects inventory integrity and prevents downstream fulfillment issues.